From d7d37fe292a85b5e1b0b34c773a6af039b7849d8 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Mon, 6 Mar 2017 11:17:50 +0100
Subject: libgit version check

---
 cmake/modules/FindLibgit2.cmake | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

(limited to 'cmake/modules')

diff --git a/cmake/modules/FindLibgit2.cmake b/cmake/modules/FindLibgit2.cmake
index f33db4a..fbfb32f 100644
--- a/cmake/modules/FindLibgit2.cmake
+++ b/cmake/modules/FindLibgit2.cmake
@@ -9,8 +9,8 @@
 
 # use pkg-config to get the directories and then use these values
 # in the FIND_PATH() and FIND_LIBRARY() calls
-#FIND_PACKAGE(PkgConfig)
-#PKG_SEARCH_MODULE(PC_LIBGIT2 libgit2)
+FIND_PACKAGE(PkgConfig)
+PKG_SEARCH_MODULE(PC_LIBGIT2 libgit2)
 
 SET(LIBGIT2_DEFINITIONS ${PC_LIBGIT2_CFLAGS_OTHER})
 
@@ -26,11 +26,28 @@ FIND_LIBRARY(LIBGIT2_LIBRARIES NAMES git2
    ${PC_LIBGIT2_LIBRARY_DIRS}
    )
 
-#Should be replaced by a version check
-include(CheckFunctionExists)
-CHECK_FUNCTION_EXISTS(git_buf_free HAVE_BUF_FREE)
+message("foo: ${LIBGIT2_INCLUDE_DIR} : ${PC_LIBGIT2_INCLUDEDIR} : ${PC_LIBGIT2_INCLUDE_DIRS}")
+
+# get version from header, should work on windows, too
+if(LIBGIT2_INCLUDE_DIR)
+    file(STRINGS "${LIBGIT2_INCLUDE_DIR}/git2/version.h" LIBGIT2_H REGEX "^#define LIBGIT2_VERSION \"[^\"]*\"$")
+
+    string(REGEX REPLACE "^.*LIBGIT2_VERSION \"([0-9]+).*$" "\\1" LIBGIT2_VERSION_MAJOR "${LIBGIT2_H}")
+    string(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_MINOR  "${LIBGIT2_H}")
+    string(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_PATCH "${LIBGIT2_H}")
+    set(LIBGIT2_VERSION "${LIBGIT2_VERSION_MAJOR}.${LIBGIT2_VERSION_MINOR}.${LIBGIT2_VERSION_PATCH}")
+
+    set(LIBGIT2_MAJOR_VERSION "${LIBGIT2_VERSION_MAJOR}")
+    set(LIBGIT2_MINOR_VERSION "${LIBGIT2_VERSION_MINOR}")
+    set(LIBGIT2_PATCH_VERSION "${LIBGIT2_VERSION_PATCH}")
+
+    unset(LIBGIT2_H)
+endif()
 
 INCLUDE(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(libgit2 DEFAULT_MSG LIBGIT2_LIBRARIES LIBGIT2_INCLUDE_DIR HAVE_BUF_FREE)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(libgit2
+    REQUIRED_VARS LIBGIT2_LIBRARIES LIBGIT2_INCLUDE_DIR
+    FOUND_VAR LIBGIT2_FOUND
+    VERSION_VAR LIBGIT2_VERSION)
 
 MARK_AS_ADVANCED(LIBGIT2_INCLUDE_DIR LIBGIT2_LIBRARIES)
-- 
cgit v1.2.3